From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932753AbXCZV3N (ORCPT ); Mon, 26 Mar 2007 17:29:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932812AbXCZV2b (ORCPT ); Mon, 26 Mar 2007 17:28:31 -0400 Received: from mtagate8.uk.ibm.com ([195.212.29.141]:63274 "EHLO mtagate8.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932507AbXCZV0n (ORCPT ); Mon, 26 Mar 2007 17:26:43 -0400 Message-Id: <20070326212640.095897934@de.ibm.com> References: <20070326212459.711271424@de.ibm.com> User-Agent: quilt/0.46-1 Date: Mon, 26 Mar 2007 23:25:05 +0200 From: Heiko Carstens To: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Cc: Martin Schwidefsky , Horst Hummel Subject: [patch 6/8] dasd: Add sysfs attribute status and generate uevents. Content-Disposition: inline; filename=114-dasd-status.diff Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Horst Hummel This patch adds a sysfs-attribute 'status' to make the DASD device-status accessible from user-space. In addition, the DASD driver generates an uevent(CHANGE) for the ccw-device on each device-status change. This enables user-space applications (e.g. udev) to do related processing. Cc: Martin Schwidefsky Signed-off-by: Horst Hummel Signed-off-by: Heiko Carstens --- drivers/s390/block/dasd.c | 3 ++ drivers/s390/block/dasd_devmap.c | 41 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 44 insertions(+) Index: linux-2.6/drivers/s390/block/dasd.c =================================================================== --- linux-2.6.orig/drivers/s390/block/dasd.c +++ linux-2.6/drivers/s390/block/dasd.c @@ -398,6 +398,9 @@ dasd_change_state(struct dasd_device *de if (device->state == device->target) wake_up(&dasd_init_waitq); + + /* let user-space know that the device status changed */ + kobject_uevent(&device->cdev->dev.kobj, KOBJ_CHANGE); } /* Index: linux-2.6/drivers/s390/block/dasd_devmap.c =================================================================== --- linux-2.6.orig/drivers/s390/block/dasd_devmap.c +++ linux-2.6/drivers/s390/block/dasd_devmap.c @@ -829,6 +829,46 @@ dasd_discipline_show(struct device *dev, static DEVICE_ATTR(discipline, 0444, dasd_discipline_show, NULL); static ssize_t +dasd_device_status_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct dasd_device *device; + ssize_t len; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (!IS_ERR(device)) { + switch (device->state) { + case DASD_STATE_NEW: + len = snprintf(buf, PAGE_SIZE, "new\n"); + break; + case DASD_STATE_KNOWN: + len = snprintf(buf, PAGE_SIZE, "detected\n"); + break; + case DASD_STATE_BASIC: + len = snprintf(buf, PAGE_SIZE, "basic\n"); + break; + case DASD_STATE_UNFMT: + len = snprintf(buf, PAGE_SIZE, "unformatted\n"); + break; + case DASD_STATE_READY: + len = snprintf(buf, PAGE_SIZE, "ready\n"); + break; + case DASD_STATE_ONLINE: + len = snprintf(buf, PAGE_SIZE, "online\n"); + break; + default: + len = snprintf(buf, PAGE_SIZE, "no stat\n"); + break; + } + dasd_put_device(device); + } else + len = snprintf(buf, PAGE_SIZE, "unknown\n"); + return len; +} + +static DEVICE_ATTR(status, 0444, dasd_device_status_show, NULL); + +static ssize_t dasd_alias_show(struct device *dev, struct device_attribute *attr, char *buf) { struct dasd_devmap *devmap; @@ -939,6 +979,7 @@ static DEVICE_ATTR(eer_enabled, 0644, da static struct attribute * dasd_attrs[] = { &dev_attr_readonly.attr, &dev_attr_discipline.attr, + &dev_attr_status.attr, &dev_attr_alias.attr, &dev_attr_vendor.attr, &dev_attr_uid.attr, --